Apple's latest patent application is “Controlling Wireless Scans Used to Determine the Location of a Portable Electronic Device.” This application, number 20140179344, has this abstract.

Described herein are methods and apparatus for controlling wireless scans used to determine the location of a portable electronic device. In described embodiments, the portable electronic device determines if user notifications are currently suppressed (i.e., if the device is operating in a "do not disturb" mode). In the case that user notifications are currently suppressed on the portable electronic device, the interval between the wireless scans used to determine the location of the portable electronic device is increased. Furthermore, in described embodiments, the portable electronic device determines its location. Then based on its location, it determines a travel time to a boundary (e.g., a geo-fence) and adjusts the frequency of wireless scans used to determine the location of the portable electronic device based on the travel time.

PFHub notes that there's something rather unique about this patent. There's a woman listed among the inventors.

The application is unusual for including a woman inventor in the list of those involved in creating the idea, Monika Bansal of Sunnyvale, California. The other inventors are Devrim Varoglu and Swapnil R. Dave. Ms. Bansal has worked for Apple since 2009 as an iOS Bluetooth QA Engineer, after working for two years at Qualcomm. She has degrees from Punjab Technical University and the University of Texas at Arlington.